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Nozgaow. PatetedMarj11,1sa4;

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P. S. SVBNSON.

LOCKu TNO. 295,077.

Patented Mar. 11,1884.

WITNESSES N mins. Plwmuwmphef, wasningum. D D

AUNITED STATES PATENT Ormes,

FRlTZ SAMUEL SVENSON, OF-LUND, SKE, SXVEDEN.

LOCK.

SPECIFICATION forming' part of Letters Patent No. 295,077', dated March 11, 1884.

Application filed October 15,1888. (No model.)

To @Z5 whom t may concern:

Be it known that I, FRITZ SAMUEL SON, doctor philosophiee, a subject of the King oi' Sweden, residing at Lund, in the Province of Skjine and Kingdom of Sweden, haveinvented certain new and useful Improvements in Locks, and I do declare the followf ing to be a full, clear, and exact description Vof the invention, such as will enable others skilled in the art to which it appertains to make and use the saine, reference being had to the accompanying drawings, and to the letters and gures of reference marked thereon,

vwhich forni apart of this speci'iication.

Figure I is 'a front view of a portion of a door provided with my improved spring-loek. Fig. 2 is a similar View with the lock-casing removed. lock removed, showing the manner 'of attaching the tu1nblercase- Fig. et is a vertical section on line a?, Fig. I; and Fig. 5 is a perspective detailvviexv of the tumbler-case and its fastening-nut.

Similar letters of reference indicate correv spending parts in all the iigures.

My invention has relation to locks adapted to catch automatically' when the door is closed; and it consists in the improved construction and combination of parts of a lock in which a square holt may be sprung forward in closing the door by the action of a beveled bolt striking a removable iiange upon the catchplate upon the door-frame, as hereinafter more fully described and claimed.

In the accompanying drawings, the letter A indicates the door, and B the frame, and the door has a shouldered perforation, C, near its latch edge, 'the inner portion of which, D, is larger in diameter than the outer, E. The cylindrical tumbler-case F, which may contain tuinblers of the Yale construction, or of any other suitable construction, nts into the outer portion of the` bore in the door, and is provided upon its inner screw-threaded end, G, with au annular nut, H, which bears against the shoulder formed by the larger portion of the perforation and secures the tumbler-case, which has the usual flange, I, at its outer end bearing against the outer side of the door in the perforation. The inner end of the turn- Fig.- 3 is a similar viev.T with the ing bolt in the tumbler-ease, which bolt is lettered J, has a ilat inWardly-projecting end, K, Which, in case of a very thick door, is eX- tended to forni a flat connectingbar, and which projects into a transi-*erse groove, L, in the' for the lock mechanism, and has a number ot' screw-holes, S, corresponding to similar holes, T, in the inner plate, through which holes the securing-screws pass. The main bolt U, which is rectangular in cross-section at its outer end, slides with that end in a slot, V, in the front plate of the casing and in a bearing, W, upon the inside of the. inner plate with its inner portion, and is provided with a cross-piece or yoke, X, upon its inner end, against the inner side of which the ends of the cams bear when they are operated, drawing the holt back. A spiral spring, Y, bears with its one end against the bearing IV, and with its other -end against the rectangular outer portion of thebolt, forcing the same out, and the inner portion of the rectangular portion of the bolt forms a shoulder, Z, upon its upper side, facing toward the front plate of the casing. A beveled catch, a, bears against the upper side of the shoulder when the bolt is shot, and catches over the shoulder when the bolt is drawn in, and is secured upon the end of a dat spring, b, secured at its upper end to the inner plate of the lool;- casing. An upright spring, c, is secured to the free end of the catch, and is provided with a similar catch, d, at its upper end, which catch is adapted to be engaged by the end of the vertical arm of a bell-crank, e, pivoted upon the inner plate oi' the lock-casing and bearing With the end of its downwardly-pending arm againstthe inner end of the beveled spring-boltf, which yslides in a bearing, y, in the front plate of the casing above the main bolt. Aknob, 7l., turns with its inner reduced end in a perforation in the outer flanged plate of the casing, and is provided upon the inner end, inside the casing, with a cani., t, which serves to draw the bolt back, when itis turned,

ioo

bearing with one of its ends against the yoke or cross-piece of the main bolt. The eatehplate j, upon the inner edge of the door-frame, has an ii'lwardly-projeoting ange, 7c, having two slots, Z and m. Into the upper one, Z, the main bolt iits, and a hook-shaped plate, oz', is pivoted upon the plate near its upturned straight end o, which will, when the hook is turned with its straight portion in a horizontal position, forni a continuation of the ilange 7c, and be in position for the beveled end of the spring-bolt tostrike it and be pushed in by it. 'When the hook is turned into avertioal position, the hooked end will pass through the lower slot in the iiange of the catch-plate into a slot, p, in the lower end of the front plate ofthe look-easing, forming an extra bolt7 which can only be operated from inside the door.

It will now be seen that when the mainbolt is drawn baok, either by the knob or by the key turning the tumbler-bolt, the oateh will engage the shoulder upon the bolt and retain it. Then the door now is olosed and the beveled end of the spring-bolt strikes the upturned end of the hook upon the catch-plate, the innerend of the spring-bolt will foree the depending arin of the bell-crank baek and the horizontal arni of the same will raise the upper eatoh, which' will disengage the lower spring-catch, allowing the bolt to shoot out. In this manner the look may be either used as a spring-latch or as a oonnnon bolt-look by simply Changing the position of the4 pivoted hook, and the hook may serve as an additional bolt for securing the door from the inside.

Having th-us described my invention, I Claim,

and desire to secure by Letters Patent of the 'United States- 1. rlhe combination of a niain bolt in aloek ha-ving .its outer end out off square, actuated or shot by a spring, and having a shoulder facing outward, a spring-catch adapted to engage the shoulder upon the bolt when the latter is drawn baok, and having an` upright springeateh upon its upper side adapted to be engaged by the arm of a bell-crank, a bellcrank pivoted in the look-easing, a beveled spring-bolt bearing with its inner end against the other arm of the bell-crank, and a oatehplate having a slot for the reception of the main bolt, and a removable iiange adapted to be struek by the beveled spring-bolt, as and for the purpose shown and set forth.

2. The combination of a main bolt in a look having ineans for drawing it baek, and having a spring for shooting it, and having its outer end out off square and an` outwardlyfaeing shoulder` upon its upper side, a beveled spring-catch adapted to engage the shoulder when the bolt is drawn back, and having an upright spring provided with a beveled catch at its upper end, a bell-crank having one arm adapted to engage the oatoh upon the end of the upright spring, when the spring-oatoh engages the shoulder upon the bolt, a beveled spring-bolt bearing with itsv inner-end against the other arin of the bell-orank, a Catch-plate having a slot for the iveeeption of the end of the main bolt and a slot below the same, and a hook pivoted upon the inner side of the doorfraine or the plane part of the catch-plate, having one end turned up to form a flange adapted to be brought in line with the slotted flange of the catch-plate, .and to be struck by the spring-bolt, and having its hooked end adapted to be turned down to pass througl'i the lower slot in the ii `nge of the catch-plate into a corresponding slot in-the front plate'of the look-easing, as and for the purpose shown and set forth.

In testimony whereof I aix niy signature in presence of two witnesses.

FRITZ SAMUEL SVENSON.

Vitnesses:

AXER. II. VANsoY, A. M. vonT 

